DTC Logic

Diagnosis Procedure
1.CHECK USB HARNESS
Visually check USB harness.
U1243 display unit
U1255 satellite radio tunerTrunk room lamp circuit
Description
Controls the trunk room lamp (ground side) to turn the trunk room lamp ON and
OFF.
Component Function Check
CAUTION: Before performing the diagnosis,
check that the following is normal.
Battery saver output/power supply
Trunk room lamp bulb
1.CHECK TRUNK ROOM LAMP OPERATI ...
Power supply and ground circuit
AV CONTROL UNIT
AV CONTROL UNIT : Diagnosis Procedure
1.CHECK FUSES
Check that the following AV control unit fuses are not blown.
2.POWER SUPPLY CIRCUIT CHECK
Disconnect AV control unit connectors M160 and M163.
Check voltage between the AV control unit connectors M160
and M163 ...
Display unit
Reference Value
TERMINAL LAYOUT
PHYSICAL VALUES
...